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  • Manuscript-Jianming et al_2022

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Combating Li metal deposits in all-solid-state battery via the piezoelectric and ferroelectric effects

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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  • Jianming Tao
  • Yue Chen
  • Aman Bhardwaj
  • Lang Wen
  • Jiaxin Li
  • Oleg V. Kolosov
  • Yingbin Lin
  • Zhensheng Hong
  • Zhigao Huang
  • Sanjay Mathur
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Article numbere2211059119
<mark>Journal publication date</mark>11/10/2022
<mark>Journal</mark>Proceedings of the National Academy of Sciences of the United States of America
Issue number41
Volume119
Number of pages7
Publication StatusPublished
Early online date3/10/22
<mark>Original language</mark>English

Abstract

All-solid-state Li-metal batteries (ASSLBs) are highly desirable, due to their inherent safety and high energy density; however, the irregular and uncontrolled growth of Li filaments is detrimental to interfacial stability and safety. Herein, we report on the incorporation of piezo-/ferroelectric BaTiO 3 (BTO) nanofibers into solid electrolytes and determination of electric-field distribution due to BTO inclusion that effectively regulates the nucleation and growth of Li dendrites. Theoretical simulations predict that the piezoelectric effect of BTO embedded in solid electrolyte reduces the driving force of dendrite growth at high curvatures, while its ferroelectricity reduces the overpotential, which helps to regularize Li deposition and Li + flux. Polarization reversal of soft solid electrolytes was identified, confirming a regular deposition and morphology alteration of Li. As expected, the ASSLBs operating with LiFePO 4 /Li and poly(ethylene oxide) (PEO)/garnet solid electrolyte containing 10% BTO additive showed a steady and long cycle life with a reversible capacity of 103.2 mAh g −1 over 500 cycles at 1 C. Furthermore, the comparable cyclability and flexibility of the scalable pouch cells prepared and the successful validation in the sulfide electrolytes, demonstrating its universal and promising application for the integration of Li metal anodes in solid-state batteries.